63388505 has 8 divisors (see below), whose sum is σ = 76350600. Its totient is φ = 50521216.

The previous prime is 63388489. The next prime is 63388513. The reversal of 63388505 is 50588336.

It can be written as a sum of positive squares in 4 ways, for example, as 6431296 + 56957209 = 2536^2 + 7547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63388505 - 2⁴ = 63388489 is a prime.

It is a super-2 number, since 2×63388505² = 8036205132270050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22220 + ... + 24909.

It is an arithmetic number, because the mean of its divisors is an integer number (9543825).

Almost surely, 2^63388505 is an apocalyptic number.

It is an amenable number.

63388505 is a deficient number, since it is larger than the sum of its proper divisors (12962095).

63388505 is a wasteful number, since it uses less digits than its factorization.

63388505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47403.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 63388505 is about 7961.6898331950. The cubic root of 63388505 is about 398.7219730500.

The spelling of 63388505 in words is "sixty-three million, three hundred eighty-eight thousand, five hundred five".